Recip blade

Patent metadata

Field	Value
Publication number	US-2023182220-A1
Application number	US-202318099554-A
Country	US
Kind code	A1
Filing date	Jan 20, 2023
Priority date	Dec 8, 2014
Publication date	Jun 15, 2023
Grant date	—

Abstract

A recip blade has a cutting edge defining a cutting direction and a repeating pattern of cutting teeth. Each repeating pattern includes (i) a leading tooth with respect to the cutting direction that includes a rake face defining a first rake angle that is negative, and (ii) a trailing tooth following the leading tooth with respect to the cutting direction that includes a rake face defining a second rake angle that is less negative than the first rake angle.

First claim

What is claimed is:

1 . A reciprocating saw blade comprising:
a blade body; and a cutting edge provided along one edge of the blade body and defining a cutting direction, the cutting edge comprising a repeating pattern of cutting teeth, wherein each repeating pattern comprises:
a leading tooth with respect to the cutting direction, the leading tooth comprising:
a first tooth tip defining a first tooth height; and
a first rake face defining a first negative rake angle; and

a first trailing tooth following the leading tooth with respect to the cutting direction, the first trailing tooth comprising:
a second tooth tip defining a second tooth height that is less than the first tooth height; and
a second rake face defining a second rake angle that is greater than the first rake angle.

2 . The reciprocating saw blade of claim 1 , wherein the cutting teeth define at least 12 teeth per inch.

3 . The reciprocating saw blade of claim 1 , whereint he leading tooth defines a first number of teeth per inch and the first trailing tooth defines a second number of teeth per inch that is greater than the first number of teeth per inch.

4 . The reciprocating saw blade of claim 1 , wherein the second rake angle is a negative angle.

5 . The reciprocating saw blade of claim 1 , wherein each repeating pattern further comprises a second trailing tooth disposed between the first trailing tooth and the leading tooth with respect to the cutting direction, the second trailing tooth comprising:
a third tooth tip defining a third tooth height; and a third rake face defining a third rake angle that is greater than the first rake angle, wherein the third tooth height is less than the first tooth height.

6 . The reciprocating saw blade of claim 5 , wherein the third tooth height is equal to the second tooth height and wherein the third rake angle is equal to the second rake angle.

7 . The reciprocating saw blade of claim 5 , wherein the leading tooth is an unset tooth with respect to the cutting direction, the first trailing tooth is set to a first side of the blade body with respect to the cutting direction at a first distance, and the second trailing tooth is set to a second side of the blade body opposite the first side at a second distance.

8 . The reciprocating saw blade of claim 7 , wherein the first distance and the second distance are equal.

9 . The reciprocating saw blade of claim 5 , wherein the leading tooth is an unset tooth with respect to the cutting direction, the first trailing tooth is set to a first side of the blade body with respect to the cutting direction at a first distance, and the second trailing tooth is set to the first side of the blade body at a second distance.

10 . The reciprocating saw blade of claim 9 , wherein the first distance and the second distance are equal.

11 . The reciprocating saw blade of claim 1 , wherein the leading tooth further comprises a first primary clearance surface extending from the first tooth tip at a first primary clearance angle,
wherein the first trailing tooth further comprises a second primary clearance surface extending from the second tooth tip at a second primary clearance angle, and wherein the first primary clearance angle is greater than the second primary clearance angle.

12 . The reciprocating saw blade of claim 1 , wherein the leading tooth further comprises a first primary clearance surface extending from the first tooth tip and a first included angle between the first rake face and the first primary clearance surface,
wherein the first trailing tooth further comprises a second primary clearance surface extending from the second tooth tip and a second included angle between the second rake face and the second primary clearance surface, and wherein the first included angle is greater than the second included angle.

13 . A reciprocating saw blade comprising:
a blade body; and a cutting edge provided along one edge of the blade body and defining a cutting direction, the cutting edge comprising a repeating pattern of cutting teeth with a number of teeth per inch being 12 teeth per inch or greater, wherein each repeating pattern comprises:
a leading tooth with respect to the cutting direction, the leading tooth comprising:
a first tooth tip defining a first tooth height;
a first rake face defining a first rake angle, wherein the first rake angle is a negative angle; and
a first primary clearance surface extending from the first tooth tip and a first included angle between the first rake face and the first primary clearance surface;

a trailing tooth following the leading tooth with respect to the cutting direction, the trailing tooth comprising:
a second tooth tip defining a second tooth height;
a second rake face defining a second rake angle that is greater than the first rake angle; and
a second primary clearance surface extending from the second tooth tip and a second included angle between the second rake face and the second primary clearance surface, wherein the second included angle is less than the first included angle.

14 . The reciprocating saw blade of claim 13 , wherein each repeating pattern further comprises a second trailing tooth disposed between the trailing tooth and the leading tooth with respect to the cutting direction, the second trailing tooth comprising:
a third tooth tip defining a third tooth height that is less than the first tooth height; a third rake face defining a third rake angle; and a third primary clearance surface extending between the third tooth tip and a third included angle between the third rake face and the third primary clearance surface, wherein the third included angle is less than the first included angle.

15 . The reciprocating saw blade of claim 14 , wherein the third rake angle is less than the first rake angle.

16 . The reciprocating saw blade of claim 14 , wherein the leading tooth is an unset tooth with respect to the cutting direction, the trailing tooth is set to a first side of the blade body with respect to the cutting direction at a first distance, and the second trailing tooth is set to a second side of the blade body opposite the first side at a second distance.

17 . The reciprocating saw blade of claim 14 , wherein the leading tooth is an unset tooth with respect to the cutting direction, the trailing tooth is set to a first side of the blade body with respect to the cutting direction at a first distance, and the second trailing tooth is set to the first side of the blade body at a second distance.

18 . A reciprocating saw blade for cutting a metal work piece comprising:
a blade body; a cutting edge provided along one edge of the blade body and defining a cutting direction, the cutting edge comprising a first repeating pattern of cutting teeth, wherein the first repeating pattern of cutting teeth comprises:
a leading tooth comprising:
a first tooth tip defining a first tooth height; and
a first rake means for enhancing the life of the blade;

at least one trailing tooth following the leading tooth with respect to the cutting direction, the at least one trailing cutting tooth comprising:
a second tooth tip defining a second tooth height that is less than the first tooth height; and
a second rake means for reducing the size of any burrs generated in cutting the metal work piece.

19 . The reciprocating saw blade of claim 18 , wherein the leading tooth further comprises a first primary clearance surface extending from the first tooth tip and a first inclu

Assignees

• Black & Decker Inc

Inventors

• Green Matthew C
• Hampton Stephen A
• Korb William B

Classifications

• B23D61/128

  Sabre saw blades · CPC title

• B23D61/121 Primary

  Types of set; Variable teeth, e.g. variable in height or gullet depth; Varying pitch; Details of gullet · CPC title

• B23D61/1216 Primary

  Repeating pattern of groups having three or more teeth · CPC title